4005161 has 8 divisors (see below), whose sum is σ = 4173120. Its totient is φ = 3839248.

The previous prime is 4005137. The next prime is 4005173. The reversal of 4005161 is 1615004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4005161 - 2¹⁰ = 4004137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4005121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4430 + ... + 5256.

It is an arithmetic number, because the mean of its divisors is an integer number (521640).

Almost surely, 2^4005161 is an apocalyptic number.

It is an amenable number.

4005161 is a deficient number, since it is larger than the sum of its proper divisors (167959).

4005161 is a wasteful number, since it uses less digits than its factorization.

4005161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 4005161 is about 2001.2898340820. The cubic root of 4005161 is about 158.8083473290.

The spelling of 4005161 in words is "four million, five thousand, one hundred sixty-one".